There are multiple posts on the Minor Planet Mailing List about 2008 TC3.
Some sample information includes the following:
We have received a set of photometric data taken by Marek Kozubal and Ronald Dantowitz at the Clay Center Observatory, Dexter School, MA, spanning about 2 hours. In addition to a dramatic trend of about 2.5 magnitudes brightening, the data show a very clear periodicity of about 0.9 magnitude amplitude and a simple period of 49 seconds, or a double period of 98 seconds. Thus Richard's analysis is just about right, within his stated error estimate. After de-trending the data and examining a longer time series, it appears that the variation is not simply periodic, but instead the object appears to be in a non-principal axis spin state, or "tumbling". There are a few other tumbling super-fast rotators, so this is not a unique case. It will take a bit more time for a careful analysis, since aspect is changing as fast as the brightness, so there may need to be a "de-trending" of the time series applied as well.
Alan Harris (Senior Research Scientist, Space Science Institute) and Brian Warner
Link: Minor Planet Mailing List (MPML)
Link: Post
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